Power Characteristics of a Fuel Cell Micro-grid with Wind Power Generation

Abstract

A micro-grid technique is predicted to be effective with respect to backup power supply in an emergency, peak cut of power plants, and exhaust heat utilization. Furthermore, when renewable energy is connected to a micro-grid, there is potential to reduce the amount of greenhouse gas discharge [21, 22, 91]. A micro-grid has an interconnection system with commercial power, etc., and the independence supplying system of the power. The micro-grid with an interconnection system outputs and inputs the power between other grids. Therefore, the dynamic characteristic of the grid is influenced by the grid of a connection destination. When a micro-grid and a large-scale grid such as a commercial power system are interconnected, the dynamic characteristics of the power depend on the commercial power system. For this reason, in the micro-grid of the interconnection type, the option regarding the equipment to connect is large. On the other hand, since the micro-grid can reduce transportation loss of power and heat, this technique may become the major energy supply. The method of connecting two or more smallscale fuel cells and renewable energy equipment by a micro-grid, and supplying power to the demand side is effective in respect to environmental problems. Thus, this chapter examines the independent micro-grid that connects fuel cells and wind power generation. In order to follow load fluctuation with an independent grid system, a method of installing a battery and a method of controlling the output of power generators can be used.